Cook C J, Kothiyal K
Division of Occupational Therapy, Faculty of Health, University of Western Sydney Macarthur, Campbelltown, NSW, Australia.
Appl Ergon. 1998 Dec;29(6):439-43. doi: 10.1016/s0003-6870(98)00008-8.
Anecdotal reports of shoulder and arm discomfort related to computer mouse use are common. The aim of this study of ten subjects was to examine the influence of mouse position, relative to the keyboard, on shoulder and arm muscular activity and working posture. Surface electromyography and the Rapid Upper Limb Assessment were used to determine the differences in muscle activity and posture during an editing task in each of three mouse positions. Significantly less anterior (p = 0.01) and middle (p = 0.03) deltoid electromyographic activity was demonstrated when the computer mouse was positioned adjacent to a keyboard without a numeric pad when compared to performance of an identical task with the mouse adjacent to a standard keyboard. Electromyographic activity in trapezius muscle did not differ between mouse positions. Working posture of right handed mouse users is improved by removal of the numeric keypad.
与使用电脑鼠标相关的肩部和手臂不适的轶事报道很常见。这项针对10名受试者的研究旨在探讨鼠标相对于键盘的位置对肩部和手臂肌肉活动及工作姿势的影响。在三种鼠标位置的每一种情况下，在编辑任务期间，使用表面肌电图和快速上肢评估来确定肌肉活动和姿势的差异。与鼠标靠近标准键盘执行相同任务相比，当电脑鼠标靠近没有数字小键盘的键盘放置时，三角肌前束（p = 0.01）和中束（p = 0.03）的肌电活动明显减少。鼠标位置之间斜方肌的肌电活动没有差异。移除数字小键盘可改善右手使用鼠标者的工作姿势。
